CLARKSVILLE (AP) — A Dardenelle man convicted of beating his 71-year-old mother to death with a shovel has been sentenced again to life in prison.

Tommy Bowden, 49, was sentenced Friday after a Johnson County jury deliberated for about 30 minutes, according to the Southwest Times Record of Fort Smith.

Bowden was convicted last October of first-degree murder and sentenced to life in prison for the January 2012 death of Julie Richardson. His initial sentence was overturned by a judge who found that a deputy sheriff exposed jurors to prejudicial information during the sentencing phase.

Bowden testified Friday he was “sorry” and “ashamed” of killing his mother — but said he believed she had poisoned him and his stepfather and had abused his stepfather.